Mathematics, 30.01.2021 22:30, gracie18383

A group of 4 friends decide to attend a night of dinner and dancing on a cruise ship. The dinner and dance cruise will last 4 hours. The ship travels 18 km upstream and then travels back to the starting point. The river has a current of 2 km an hour. What is the cruise ship's speed and how long was the upstream journey?

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A group of 4 friends decide to attend a night of dinner and dancing on a cruise ship. The dinner and...